John Gossom, MD
John Gossom, MD is a Geriatric Medicine (Family Medicine) Physician in Friday Harbor, WA, registered under NPI 1245221886. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 689 AIRPORT CENTER DR STE B, Friday Harbor, WA 98250. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| MD00018422 | WA | Geriatric Medicine (Family Medicine)… primary |
This provider holds licence MD00018422 issued in WA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Geriatric Medicine covers
A family medicine physician with special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes, and the hospital. NUCC Health Care Provider Taxonomy, code 207QG0300X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1245221886 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 2, 2005 |
| Last updated | Mar 4, 2011 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
689 AIRPORT CENTER DR STE B Friday Harbor, WA 98250 (360) 378-1338 Fax (360) 378-1830 |
| Mailing address |
PO BOX 1550 Friday Harbor, WA 98250 |
| Other identifiers |
5877GO
· Other 912109329 · Other 912109329 · Other 0152514 · Other 5403470 · Other 912109329 · Other 912109329 · Other 912109329 · Other 361929500 · Other 532300001 · Other 8101404 · Other MD00018422 · Other 98250A003 · Other 8937843 · Other 912109329 · Other |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 2 | 4 | 5 | 2 | 2 | 1 | 8 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 8 | 5 | 4 | 2 | 2 | 8 | 7 |
Sum = 64 · next multiple of 10 = 70 · check digit = 6 · actual last digit = 6
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.